Might be stupid to debate these things with so much seriousness and conviction but any betting man would bet that China would bring ACE engines into service well before Russia does at least as far as official declaration goes. Russia is running on fumes. It has barely a fraction of the funding Chinese organisations have, barely the same level and extent of tools and resources or human talent. Russia's lost a lot of human talent just over the last few years.
If we chart out the trajectory of these programs, the Russian engines are going the way of the Russian space program and the Russian airforce and navy. Russia is regressing in basically every measurable way. It's so fucking hard to deny that even the most unhinged Russian stronkist will feel himself a fool to continue promoting that Russia is some hub of strength and tech development.
The engine race is just between the US and China. China and Russia may be overall pretty equal in aeroengines when it comes to low bypass and ACE/VCE (and China's behind Russia in high bypass) but China's running at a pace that Russia does not match. If you were to assume Russians are just smarter to compensate, well evidence would suggest no for one but even if they are, and somehow also culturally more suited to develop and master these engines, they do not have the resources these days.
